Patents by Inventor Dawei Lu
Dawei Lu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11914339Abstract: Embodiments of the present disclosure provide a datum selection method for minimizing hole position errors in group hole machining of large components, comprising: 1) determining a type of a computer numerical control (CNC) machine tool and establishing a topological structure of the CNC machine tool; 2) establishing a theoretical postural model of a tool center point during a motion; 3) establishing a hole position error model; 4) establishing an average error model of hole positions in group hole machining; and 5) obtaining a machining datum for group holes of corresponding components. For the skeleton and skinned group hole machining of aircraft components, different principles of datum selection are provided respectively, which can effectively improve the positional accuracy of the skeleton or skinned group hole machining, at the same time provides a more scientific and reasonable approach for the datum selection in group hole machining of large components.Type: GrantFiled: August 9, 2023Date of Patent: February 27, 2024Assignee: CHENGDU AIRCRAFT INDUSTRIAL (GROUP) CO., LTD.Inventors: Jie Li, Dawei Liu, Zhenbo Ma, Yuanji Liu, Jiangyang Gou, Ying Xie, Chaolin Shuai, Xuemei Chen, Dawei Lu, Qingliang Chen
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Publication number: 20230384755Abstract: Embodiments of the present disclosure provide a datum selection method for minimizing hole position errors in group hole machining of large components, comprising: 1) determining a type of a computer numerical control (CNC) machine tool and establishing a topological structure of the CNC machine tool; 2) establishing a theoretical postural model of a tool center point during a motion; 3) establishing a hole position error model; 4) establishing an average error model of hole positions in group hole machining; and 5) obtaining a machining datum for group holes of corresponding components. For the skeleton and skinned group hole machining of aircraft components, different principles of datum selection are provided respectively, which can effectively improve the positional accuracy of the skeleton or skinned group hole machining, at the same time provides a more scientific and reasonable approach for the datum selection in group hole machining of large components.Type: ApplicationFiled: August 9, 2023Publication date: November 30, 2023Applicant: CHENGDU AIRCRAFT INDUSTRIAL (GROUP) CO., LTD.Inventors: Jie LI, Dawei LIU, Zhenbo MA, Yuanji LIU, Jiangyang GOU, Ying XIE, Chaolin SHUAI, Xuemei CHEN, Dawei LU, Qingliang CHEN
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Publication number: 20230246729Abstract: A method and apparatus for determining an outer loop value, a device, and a storage medium are disclosed. The method may include: determining a pre-trained outer loop initialization model based on current feature data of a user equipment (S11); and determining an initialized outer loop value of the user equipment based on a current air interface measurement value of the user equipment and the outer loop initialization model (S12).Type: ApplicationFiled: June 16, 2021Publication date: August 3, 2023Inventors: Jianguo LI, Qiaoyan LIU, Ke SHI, Zepeng MA, Dawei LU, Mengxi ZHUANG, Miao FAN, Shengnan SUN
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Publication number: 20230236469Abstract: An optical device stack includes at least one of a photodetector or an optical emitter and a metasurface. The metasurface is disposed over a light-receiving surface of the photodetector or a light emission surface of the optical emitter. The metasurface includes a first conductive layer having an electrically-tunable optical property and an array of conductive nanostructures disposed on a first side of the first conductive layer. A second conductive layer is disposed on a second side of the first conductive layer. An electrical insulator is disposed between the first conductive layer and the second conductive layer. A change in an electrical bias between the metasurface and the second conductive layer, from a first electrical bias to a second electrical bias, tunes the electrically-tunable optical property from a first state to a second state, and changes an electrically-tunable optical filtering property of the metasurface.Type: ApplicationFiled: March 29, 2023Publication date: July 27, 2023Inventors: Jiayu Li, Dawei Lu
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Publication number: 20230175920Abstract: A method for predicting if a flow over a smooth ramp surface will separate from the ramp surface, wherein the ramp surface has a slope that is everywhere non-positive along the length of the ramp surface relative to the flow at the inflow end of the ramp surface includes i) dividing the height of the ramp surface by the length of the ramp surface to determine a height-to-length ratio of the ramp surface, ii) identifying a maximum slope magnitude of the ramp surface, iii) calculating a maximum normalized slope by dividing the maximum slope magnitude of the ramp surface by the height-to-length ratio of the ramp surface, and calculating a critical ramp slope as a linear function of the height-to-length ratio of the ramp surface. If the maximum normalized slope is greater than the critical ramp slope, the method predicts the turbulent boundary layer will separate from the ramp surface.Type: ApplicationFiled: May 18, 2021Publication date: June 8, 2023Applicant: UNIVERSITY OF WASHINGTONInventors: Antonino Ferrante, Abhiram Aithal, Dawei Lu
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Patent number: 11665310Abstract: An electronic device has pixels that form an active area of a display for displaying images for a user. A layer of black ink or other opaque material may be formed on an inner surface of a display cover layer in an inactive area of the display that does not overlap pixels. The housing may have sidewalls such as a rear housing wall that faces away from the display. Ambient light sensor windows may be formed from tapered holes or other holes. The tapered holes may be formed in the opaque material on the display cover layer, may be formed in a rear housing wall or other hosing structure, or may be formed in other portions of the electronic device. Non-tapered holes may also form windows. Tapered holes may have sidewalls with portions that run parallel to their longitudinal axes and portions that are angled relative to their longitudinal axes.Type: GrantFiled: March 9, 2022Date of Patent: May 30, 2023Assignee: Apple Inc.Inventors: Dawei Lu, Kenneth J. Vampola, Peter Jeziorek
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Patent number: 11619857Abstract: An optical device stack includes at least one of a photodetector or an optical emitter and a metasurface. The metasurface is disposed over a light-receiving surface of the photodetector or a light emission surface of the optical emitter. The metasurface includes a first conductive layer having an electrically-tunable optical property and an array of conductive nanostructures disposed on a first side of the first conductive layer. A second conductive layer is disposed on a second side of the first conductive layer. An electrical insulator is disposed between the first conductive layer and the second conductive layer. A change in an electrical bias between the metasurface and the second conductive layer, from a first electrical bias to a second electrical bias, tunes the electrically-tunable optical property from a first state to a second state, and changes an electrically-tunable optical filtering property of the metasurface.Type: GrantFiled: May 25, 2021Date of Patent: April 4, 2023Assignee: Apple Inc.Inventors: Jiayu Li, Dawei Lu
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Publication number: 20220382120Abstract: An optical device stack includes at least one of a photodetector or an optical emitter and a metasurface. The metasurface is disposed over a light-receiving surface of the photodetector or a light emission surface of the optical emitter. The metasurface includes a first conductive layer having an electrically-tunable optical property and an array of conductive nanostructures disposed on a first side of the first conductive layer. A second conductive layer is disposed on a second side of the first conductive layer. An electrical insulator is disposed between the first conductive layer and the second conductive layer. A change in an electrical bias between the metasurface and the second conductive layer, from a first electrical bias to a second electrical bias, tunes the electrically-tunable optical property from a first state to a second state, and changes an electrically-tunable optical filtering property of the metasurface.Type: ApplicationFiled: May 25, 2021Publication date: December 1, 2022Inventors: Jiayu Li, Dawei Lu
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Publication number: 20220201240Abstract: An electronic device has pixels that form an active area of a display for displaying images for a user. A layer of black ink or other opaque material may be formed on an inner surface of a display cover layer in an inactive area of the display that does not overlap pixels. The housing may have sidewalls such as a rear housing wall that faces away from the display. Ambient light sensor windows may be formed from tapered holes or other holes. The tapered holes may be formed in the opaque material on the display cover layer, may be formed in a rear housing wall or other hosing structure, or may be formed in other portions of the electronic device. Non-tapered holes may also form windows. Tapered holes may have sidewalls with portions that run parallel to their longitudinal axes and portions that are angled relative to their longitudinal axes.Type: ApplicationFiled: March 9, 2022Publication date: June 23, 2022Inventors: Dawei Lu, Kenneth J. Vampola, Peter Jeziorek
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Patent number: 11290677Abstract: An electronic device has pixels that form an active area of a display for displaying images for a user. A layer of black ink or other opaque material may be formed on an inner surface of a display cover layer in an inactive area of the display that does not overlap pixels. The housing may have sidewalls such as a rear housing wall that faces away from the display. Ambient light sensor windows may be formed from tapered holes or other holes. The tapered holes may be formed in the opaque material on the display cover layer, may be formed in a rear housing wall or other hosing structure, or may be formed in other portions of the electronic device. Non-tapered holes may also form windows. Tapered holes may have sidewalls with portions that run parallel to their longitudinal axes and portions that are angled relative to their longitudinal axes.Type: GrantFiled: May 31, 2019Date of Patent: March 29, 2022Assignee: Apple Inc.Inventors: Dawei Lu, Kenneth J. Vampola, Peter Jeziorek
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Patent number: 10886439Abstract: Embodiments of the invention include a semiconductor light emitting device including a semiconductor structure. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region. A wavelength converting structure is disposed in a path of light emitted by the light emitting layer. A diffuse reflector is disposed along a sidewall of the semiconductor light emitting device and the wavelength converting structure. The diffuse reflector includes a pigment. A reflective layer is disposed between the diffuse reflector and the semiconductor structure. The reflective layer is a different material from the diffuse reflector.Type: GrantFiled: February 10, 2020Date of Patent: January 5, 2021Assignee: Lumileds LLCInventors: Dawei Lu, Oleg Shchekin
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Publication number: 20200382739Abstract: An electronic device has pixels that form an active area of a display for displaying images for a user. A layer of black ink or other opaque material may be formed on an inner surface of a display cover layer in an inactive area of the display that does not overlap pixels. The housing may have sidewalls such as a rear housing wall that faces away from the display. Ambient light sensor windows may be formed from tapered holes or other holes. The tapered holes may be formed in the opaque material on the display cover layer, may be formed in a rear housing wall or other hosing structure, or may be formed in other portions of the electronic device. Non-tapered holes may also form windows. Tapered holes may have sidewalls with portions that run parallel to their longitudinal axes and portions that are angled relative to their longitudinal axes.Type: ApplicationFiled: May 31, 2019Publication date: December 3, 2020Inventors: Dawei Lu, Kenneth J. Vampola, Peter Jeziorek
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Publication number: 20200286940Abstract: Embodiments of the invention include a semiconductor light emitting device including a semiconductor structure. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region. A wavelength converting structure is disposed in a path of light emitted by the light emitting layer. A diffuse reflector is disposed along a sidewall of the semiconductor light emitting device and the wavelength converting structure. The diffuse reflector includes a pigment. A reflective layer is disposed between the diffuse reflector and the semiconductor structure. The reflective layer is a different material from the diffuse reflector.Type: ApplicationFiled: February 10, 2020Publication date: September 10, 2020Applicant: LUMILEDS LLCInventors: Dawei LU, Oleg SHCHEKIN
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Patent number: 10559617Abstract: Embodiments of the invention include a semiconductor light emitting device including a semiconductor structure. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region. A wavelength converting structure is disposed in a path of light emitted by the light emitting layer. A diffuse reflector is disposed along a sidewall of the semiconductor light emitting device and the wavelength converting structure. The diffuse reflector includes a pigment. A reflective layer is disposed between the diffuse reflector and the semiconductor structure. The reflective layer is a different material from the diffuse reflector.Type: GrantFiled: February 28, 2019Date of Patent: February 11, 2020Assignee: LUMILEDS LLCInventors: Dawei Lu, Oleg Shchekin
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Publication number: 20190198549Abstract: Embodiments of the invention include a semiconductor light emitting device including a semiconductor structure. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region. A wavelength converting structure is disposed in a path of light emitted by the light emitting layer. A diffuse reflector is disposed along a sidewall of the semiconductor light emitting device and the wavelength converting structure. The diffuse reflector includes a pigment. A reflective layer is disposed between the diffuse reflector and the semiconductor structure. The reflective layer is a different material from the diffuse reflector.Type: ApplicationFiled: February 28, 2019Publication date: June 27, 2019Applicant: Lumileds LLCInventors: Dawei Lu, Oleg Shchekin
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Patent number: 10224358Abstract: Embodiments of the invention include a semiconductor light emitting device including a semiconductor structure. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region. A wavelength converting structure is disposed in a path of light emitted by the light emitting layer. A diffuse reflector is disposed along a sidewall of the semiconductor light emitting device and the wavelength converting structure. The diffuse reflector includes a pigment. A reflective layer is disposed between the diffuse reflector and the semiconductor structure. The reflective layer is a different material from the diffuse reflector.Type: GrantFiled: May 9, 2017Date of Patent: March 5, 2019Inventors: Dawei Lu, Oleg Shchekin
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Publication number: 20180331144Abstract: Embodiments of the invention include a semiconductor light emitting device including a semiconductor structure. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region. A wavelength converting structure is disposed in a path of light emitted by the light emitting layer. A diffuse reflector is disposed along a sidewall of the semiconductor light emitting device and the wavelength converting structure. The diffuse reflector includes a pigment. A reflective layer is disposed between the diffuse reflector and the semiconductor structure. The reflective layer is a different material from the diffuse reflector.Type: ApplicationFiled: May 9, 2017Publication date: November 15, 2018Applicant: LUMILEDS LLCInventors: Dawei LU, Oleg Shchekin
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Patent number: 9965884Abstract: Methods and devices for determining scoring models of a three-dimensional animation scene frame are provided.Type: GrantFiled: January 12, 2016Date of Patent: May 8, 2018Assignee: BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Liang Liu, Huadong Ma, Zeyu Wang, Dawei Lu
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Patent number: 9754379Abstract: A method and a system for determining parameters of an off-axis virtual camera provided by embodiments of present invention can extract a scene depth map for each video frame from a depth buffer, determine the minimum value of edge depth values of the scene depth map as the closest scene edge depth of each video frame, determine the depth of a first object as the depth of an object of interest of each video frame, use the smaller value between the closest scene edge depth and the depth of an object of interest as the zero-parallax value and obtain a zero-parallax value sequence constituted by the zero-parallax value of each video frame. The present invention realizes automatic determination of the zero parallax of each video frame rather than manual setting thereof, and thus the determination will not be affected by factors such as lack of experience, and the amount of work for an technician is also reduced.Type: GrantFiled: February 1, 2016Date of Patent: September 5, 2017Assignee: BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Huadong Ma, Liang Liu, Aner Liu, Dawei Lu
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Publication number: 20170109918Abstract: The embodiments of the present invention provide a method and a device for determining scoring models of a three-dimensional animation scene frame, the method comprising: obtaining a dataset of three-dimensional animation scene frames; obtaining a predetermined stereoscopic effect standard score and a predetermined visual comfort standard score corresponding to each three-dimensional animation scene frame; obtaining the disparity map of each three-dimensional animation scene frame, extracting disparity statistic features of each three-dimensional animation scene frame based on its disparity map, and combining the disparity statistic features into one feature vector; and, determining the stereoscopic effect scoring model and the visual comfort scoring model for a three-dimensional animation scene frame respectively based on the feature vector of each three-dimensional animation scene frame in conjunction with the corresponding stereoscopic effect standard score and visual comfort standard score, in order to acType: ApplicationFiled: January 12, 2016Publication date: April 20, 2017Inventors: Liang Liu, Huadong Ma, Zeyu Wang, Dawei Lu